1. Yu, Z., Gang, K.: Optimization of preventive maintenance decision considering maintenance effectiveness and planning level. J. Syst. Eng. 30(2), 281–288 (2015)
2. Malik, M.: Reliable preventive maintenance scheduling. AIIE Trans. 11(3), 221–228 (1979)
3. Ling, L: Analysis of the malfunction and maintenance measures of diesel engine failure to start after maintenance. China Mach 2014(7), 144–145 (2014)
4. Kijima, M.: Some results for repairable systems with general repair. J. Appl. Probab. 1989, 89–102 (1989)
5. Guiyuan, Y..: The central limit theorem and its application in statistical analysis. Forum Stat. Inform. 2000(3), 13–15 (2000)